Rotary pump



G. B. PETSCHE.

ROTARY PUMP.

APPLICATION FILED SEPT. 22, 1920.

1,380,012., Pater lted May 31,1921.

A TTORNEY GUSTAV B. PETSCHE, OF YONKERS, NEW YOB K.

, ROTARY PUMP.

assume.

To all whom it may concern: 7 I

Be it known that I, GUs'rAv B. Persons, a citizen of the United Statesof America, and resident of Yonkers, in the count -of W estchester andState of New York, ave

invented a certain new and useful Improve Y The nature of myimprovements will be best understood as described in connection with thedrawings in which they are illus trated and in which- Figure 1 is a sideelevat on of my pump with one of the sections of the pump casing removedand some portions including the side and swivel block shown in sectionon the line 1-1 of Fi 2.

Fi 2 is a central e evationon line 2-2 of F1 1 with the piston and slideshown in ful and Fig. 3 is a plan view of the eccentrlc ring piston. 4

The pump cylinder is preferably formed of the two sections A and Acentrally divided along the center of the cylinder, the internalperiphery of whichindlcated at A is concavely curved in such wise as tomake linear contact with the globular surfaces of the eccentric ringpiston to be hereafter described. A", A indicate the flat parallel sidewalls of the cylinder and A, A, indlcate the clearances given in thepassage connecting the' cylinder with the .bearing for the swivel blockto permit of the oscillating movements of the slide to be described. Aindicates an entrance passage for the fluid;.B indicates a bearing inthe section A for the end of the'driving shaft and B a bearin for theshaft formed in the section'A, 2 indicating the usual stufling box.

0 and 0 indicate globular bearing surfaces for the swivel blockpreferably divided like I Specification of Letters Patent.Applicationfiled September 22, 1920. Serial No. 411,878.

rammed May 31, 1921.

the cylinder alon the lin ind'c ted t DandD" g e aa indicate matingcircular flanges extendmg formed with internal and external threads,

as shown. E indicates a bearingDgland screwing into the flanges D andand formed w th a bearing surface E for the top of the globular swivelblock. F is a cap screwing on the external threads of the flanges D, D,and forming a receiving chamber F from which extends the dehvery pipe G.H, H, indicate the bolts for securing the two sections of the cylinderwas ng together. I is the driving shaft to which 1s secured an eccentricindlcated at I. J

is an eccentric ring fitting on the eccentric andv havlng its perlpheryindicated at J in' the form of a section of a globe. K is a slideextending from the eccentric ring J and preferably of cylindrical form,as shown. Ports K extend from the bottom of the slide into the deliveryside of the cylinder and communicate with a discharge passage extendingfrom the ports K to a non-return valve K normally closing this dischargepassage. K is a spring adjusting and holding sleeve screwing into thetop 55. upward from a section A and A of the slide K and L is a springfor holding the valve to its seat. M is a swivel block in which theslide K works and which works in the bearings C, C and E. The

spring holding sleeve K has by preference, and as shown, a slot on itstop.

In operation the shaft I rotates in an anti-clockwise direction and bymeans of the eccentric I rotates the eccentric ring piston whichmaintains a linear contact with the sides of the cylinder at all timesexcept when at the top of the stroke when there is a short interruptionof contact. During the rotation of the piston the slide K movesup anddown in the swivel block and oscillates throu h the necessary angletogether with the swivel block. Thefluid upon which the pump works isadmitted through the port A and is then delivered throu h the ports Kand through the hollow sli e into the chamber F, the .valve K opening topermit the passage of the fluid and closing as soon as the cycle .iscompleted.

An important feature of my invention is the formation of the eccentricring. piston with its periphery in the shape of a section of a sphereand the formation of the periphery of the cylinder with a similar curva=ture so as to form a line contact with the piston. This formation-of thecylinder and piston particularly when the cylinder 11s parted along thecentral line a, greatly facilitates the machining of the parts and'cheapens the production. An advantage of the same character is found inmaking the swivel block of a spherical form and giving,

of course corres%(:nding form to the bearings (J, 1 and and l would notethat the adjustable bearing gland E is a constructive feature of valueas it enables the bearing pressure on the swivel block to be Having now.described my invention,

nicely adjusted.

- what ll claim as new and desire to secure by Letters Patent, is:

1. A rotary pump having a cylinder and a globular bearing for a swivelblock in combination with a lobularswivel block formed with acylindrical bearing for a slide and an eccentric ring piston having .acylindrical slide extension working in the bearing in the swivel block.

2. A rotary pump having a cylinder and a globular bearing for a swivel.block in combination with a lobular swivel block formed with acylindrical bearing for a slide and an eccentric ring piston having acylindrical slide extension working in the bearingin the swivel block,said slide having formed through it a port passage for the r r- I 3. Arotary pump having a cylinder and a globular bearing for a swivel blockin combination with an adjustable gland hearing for the top of theswivel block, a globular swivel block formed with a cylindrical bearingfor a slide and an eccentric ring piston having a cylindrical slideextension working in the bearing in the swivel block, said slide havingformed through it a port passage for the pump.

4:- A rotary pump having a cylinder concavely curved to make a linearcontact with the convexly curved eccentric ring, in combination with acentrally disposed driving shaft and a rotary piston made up of aneccentric secured thereto, an eccentric ring the outerfa'ce of which hasthe form of a section of a globe and an extension from the ring forminga discharge port of the pump.

income 5. A rotarypump having a cylinder with its inner peripheryconcavely curved to term a linear contact with the concavely curved:face of the piston and a globular bearing for a swivel block incombination with an eccentric ring piston the face of which is in theform of a segment of a globe and which is rovided with an extensionslide of cylindrical form moving in a cylindrical bearing in the swivelblock.

6. A rotary pump havin a cylinder formed oi two sections divi ed alongthe center line of the cylinder the periphery of the cyllnder beingconcavely curved to make a linear contact with the iconvexly curvedeccentric ring, in combination with a centrally disposed driving shaftand a rotary piston made up of an eccentric secured thereto, .aneccentric ring the outer face or which has the form of a section of aglobe and a slide extendmg from the ring.

7. A rotary pump havin a cylinder formed of two sections divi ed alongthe center line of the cylinder the periphery of the cylinder beingconcavely curved to make a linear contact with the convexly curvedeccentric ring. andsaid sections having also formed in them'a two partglobular hearing for a swivel block, in combination with a centrallydisposed driving shaft and a retary piston made up of an eccentricsecured I thereto, an eccentric ring the outer face of which has theform of a section'of a globe and a slide extending from the ring, and 'aglobular swivel, block in which the slide work?! h l 8. rotary um savina c inder formed of two ecti ns divided aloiig the central line of thecylinder, the periphery of the cylinder being concavely curved to make alinear contact with the convexly curved eccentric ring and said sectionshaving also formed in them a two part globular hearing for a swivelblock, in combination with a centrally disposed driving shaft, arotarypiston made up of an eccentric secured to the shaft and aneccentric ring the outer face of which has the form of a section of aglobe, a globular swivel block having a cylindrical central bearing. forthe slideand a cylindrical slide extending from the eccentric ringthrough the swivel block.

9. A rotary pump having a' cylinder formed of two sections divided alongthe central line of the cylinder, the periphery of the cylinder beingconcavely curved to make a linear contact with the convexly curvedeccentric ring and said sections having also formed in them a two partlobular bearing for a swivel block, in com ination with a centrally.disposed driving shaft, a rotary piston made up of an eccentric securedto the shaft and an eccentric ring the outer face of which has the formof a section of a globe, a globularswivel block havtltl ltl

lllii llltl ing a cylindrical central bearing for the a bearing for aswivel block in combination slide, a cylindrical slide extending fromthe with a swivel block formed with a cylineccentric ring through theswivel block, said drical bearin for a slide and an eccentric 10 slidebeing formed with a discharge passage ring piston aving a cylindricalslide exextending through it and a non return valve tension workin inthe cylindrical bearing in the discharge passage of the slide. in theswivel b ock.

10. A rotary pump having a cylinder and GUSTAV B. PETSCHE.

